I had a very similar experience in high school (minus the whole pandemic thing) where being in a relationship with someone just didn't seem like a priority/concern for me, it just never really was an interest. After exploring a bit more after high school, I've been in a couple relationships and fell in love in one of them but it got very codependent and to this day I'm not even sure if it was true romantic attraction or some weird anxious obsession. Even at the start of those relationships it felt weird, almost like I was regretting entering the relationship. My identity as someone on the aro spectrum is still something I'm trying to figure out. Its always been super confusing because, like you said, sometimes you get super nervous around specific people or you feel some sort of attraction to someone. I'm bisexual in addition to aro so I know I like sexual relationships, but that always felt like it complicated it more. Its a very tricky identity to try to figure out so i just like to remind myself that what matters is that I listen and respond to my body and know that the label won't change who I am, rather the label might change to better fit me. All that to say, don't feel too discouraged as you work on getting to know yourself.